Etymology and distribution of 姚.

The Japanese surnames etymology dictionary.
https://play.google.com/store/apps/details?id=info.jigensha.jcedfreeGoogle Play で手に入れよう https://apps.apple.com/us/app/id1471109324
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Ratio of 姚.

カンマ区切りで複数の名字を指定できます。

Etymology of 姚

Distribution of 姚
Ranking
1 Wakayama-ken(0.00103%)
2 Hyougo-ken(0.000493%)
3 Kagawa-ken(0.000382%)
4 Niigata-ken(0.000322%)
5 Chiba-ken(0.000265%)
6 Toukyou-to(0.000249%)
7 Ehime-ken(0.000246%)
8 Oosaka-fu(0.00023%)
9 Saitama-ken(0.000147%)
10 Kanagawa-ken(0.000123%)
11 Fukuoka-ken(Very rare)